Display particles, display particle dispersion liquid, display medium, and display device

Abstract

There is provided a display particles including: a copolymer having a repeating unit corresponding to a vinyl compound represented by the following Formula (1) and a repeating unit corresponding to a compound with a polar group and an ethylenically unsaturated bond: ArH 2 C═CH 2 ) n   Formula (1) wherein Ar represents an unsubstituted aromatic ring or an aromatic ring substituted with an alkyl group having from 1 to 6 carbon atoms or an aryl group having from 6 to 12 carbon atoms, and n represents an integer of from 1 to 4.

What is claimed is: 
     
         1 . Display particles comprising:
 a copolymer having a repeating unit corresponding to a vinyl compound represented by the Formula (1) and a repeating unit corresponding to a compound with a polar group and an ethylenically unsaturated bond:
   ArH 2 C═CH 2 ) n   Formula (1)
 
   wherein Ar represents an unsubstituted aromatic ring or an aromatic ring substituted with an alkyl group having from 1 to 6 carbon atoms or an aryl group having from 6 to 12 carbon atoms, and   n represents an integer of from 1 to 4.   
     
     
         2 . The display particles according to  claim 1 , further comprising color particles,
 wherein each of the color particles are covered by a shell including the copolymer.   
     
     
         3 . The display particles according to  claim 1 ,
 wherein the vinyl compound represented by the Formula (1) is at least one selected from the group consisting of styrene, divinylbenzene, vinylbiphenyl, divinylbiphenyl, vinylnaphthalene, and divinylnaphthalene.   
     
     
         4 . The display particles according to  claim 1 ,
 wherein the vinyl compound represented by the Formula (1) is at least one selected from the group consisting of styrene, divinylbenzene, vinylbiphenyl, and vinylnaphthalene.   
     
     
         5 . The display particles according to  claim 1 ,
 wherein a content of the repeating unit corresponding to the compound with the polar group and the ethylenically unsaturated bond is 0.1% by mass or greater and 20% by mass or less based on a total of the copolymer.   
     
     
         6 . The display particles according to  claim 1 ,
 wherein a content of the repeating unit corresponding to the compound with the polar group and the ethylenically unsaturated bond is 5% by mass or greater and 20% by mass or less based on a total of the copolymer.   
     
     
         7 . The display particles according to  claim 1 ,
 wherein a content of the repeating unit corresponding to the compound with the polar group and the ethylenically unsaturated bond is 10% by mass or greater and 20% by mass or less based on a total of the copolymer.   
     
     
         8 . The display particles according to  claim 1 ,
 wherein a content of the repeating unit corresponding to the vinyl compound represented by the Formula (1) is 5% by mass or greater and 75% by mass or less based on a total of the copolymer.   
     
     
         9 . The display particles according to  claim 1 ,
 wherein a content of the repeating unit corresponding to the vinyl compound represented by the Formula (1) is 5% by mass or greater and 65% by mass or less based on a total of the copolymer.   
     
     
         10 . The display particles according to  claim 1 ,
 wherein a content of the repeating unit corresponding to the vinyl compound represented by the Formula (1) is 5% by mass or greater and 55% by mass or less based on a total of the copolymer.   
     
     
         11 . The display particles according to  claim 1 ,
 wherein the copolymer further includes a repeating unit corresponding to a compound having a silicone chain.   
     
     
         12 . The display particles according to  claim 11 ,
 wherein a content ratio of the repeating unit corresponding to the compound having a silicone chain is from 5% by mass to 50% by mass based on a total of the copolymer.   
     
     
         13 . The display particles according to  claim 11 ,
 wherein a content ratio of the repeating unit corresponding to the compound having a silicone chain is from 10% by mass to 40% by mass based on a total of the copolymer.   
     
     
         14 . A display particle dispersion liquid comprising:
 a particle group including the display particles according to  claim 1 ; and   a dispersion medium for dispersing the particle group.   
     
     
         15 . A display medium comprising:
 a pair of substrates, at least one of which has translucency, which are disposed with a space interposed therebetween;   a migrating particle group which is sealed between the pair of substrates and migrates in accordance with an electric field;   a display particle group which is sealed between the pair of substrates and includes the display particles according to  claim 1 ; and   a dispersion medium which is sealed between the pair of substrates to disperse the migrating particle group and the display particle group.   
     
     
         16 . A display device comprising:
 the display medium according to  claim 15 ; and   an electric field forming unit which forms an electric field between the pair of substrates.